Combustion device for steam-boilers and the like.



G. E. PEDERSEN. COMBUSTION DEVICE FOR STEAM BOILERS AND THE LIKE.APPLICATION HLED 050.31.1915.

Patented Feb. 19, 1918.

$1M aw Jim I? h? MM I CAR EMIL ZPZEDERSEN', or osTRE AKER, NEARCHRISTIANIA, NORWAY.

COMBUSTION DEVICE roe STEAM-BOILERS AND THE LIKE.

' Specification of Letters Patent.

Patented Feb.19,1918.

7 Application filed December 31, 1915. Serial No.. 69,510.

To all whom it may concern:

Be it known that I, CARL EMIL PEDnRsnN, a subject of the King of Norway,residing at jstre Aker, near Jhristiania, Norway, have invented certainnew and useful Improvements in Combustion Devices for Steam-Boilersand'the like; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to letters orfigures of reference marked thereon, which form a part of thisspecification.

My present invention relates to coal burners or combustion devices forsteam boilers, and the object of my invention is to provide a combustiondevice into which the coal pieces are fed continually from above andevaporize before they reach the bottom of the combustion chamber. Eachcombustion chamber forms an independent unit and is connected with thefire space of the boiler by means of a tube or mouth piece. A convenientnumber of such combustion chambers may be provided for each boiler. Thepresent coal burner differs from the well known coal dust burners, wherecoal dust is injected together with air in the heating space of theboiler in that the coal used is not in the form of dust or powder butonly granulated to a size of ordinary nuts or small walnuts. Nor arethese coal pieces injected into the heating space of the boiler but aremerely dropped into the combustion chamber, where they evaporizecompletely owing to the great heat in the said chamber.

On the drawings:

Figure 1 is a vertical sectional view of a combustion chamber andaboiler.

Fig. 2 is a plan sectional view of the boiler and several combustionchambers, while Fig. 3 is a section through a boiler house showing thearrangement of the combustion chamber according to the invention.

Referring now to Figs. 1 and 2 A is a combustion chamber which mayconsist of a plate iron casing with an interior lining of refractorymaterial. Each casing has a refractory mouth piece B, which projectsinto the boiler C through an opening in the wall of the same. The coalis fed from the hopper D by means of a suitable feeding device E and isdropped into the combustion space F. The temperature in this space beingextremely high owing to the combustion, which may be aided by means ofpressure air draft from pipes H, the coal pieces will be completelyevaporized and partly combusted during their fall toward the grate G,and the combustion products as well as'the evaporized non combusted coalgas owing to the air pressure will be blown through the mouth piece Binto the boiler C. In order to avoid irregularities in the heating ofthe furnace a heat absorbing body I may be placed in the boiler in frontof the mouth pieces B, so that it is heated by the flame from the saidmouth piece. This heat absorbing body may consist of stones and gravelor other convenient substances. In order to allow for repair of thecombustion chambers the same are provided with wheels K running on railsL, so that they may easily be taken away and changed.

In the embodiment above described the combustion chambers are connectedto the boiler, at one side of the same, and this arrangement is the mostconvenient when an old boiler is to be provided with the present coalburners. WVhen however a new boiler shall be equipped with the presentarrangement, this may be done according to Fig. 3 by placing thecombustion chambers A at one end of the boiler.

Claims:

1. In a device of the character described, the combination with aboiler, of a combustion chamber adjacent thereto, an elongatedmouthpiece at the top of said combustion chamber and projectingtherefrom into the heating space of the boiler, and means for feedingfuel into the top of said combustion chamber transversely of the path ofthe flame and gases through said mouth-piece, whereby said fuel willfall the length of said combustion chamber and be subject to the actionof an air current in said combustion chamber.

2. In a device of the character described, the combination with aboiler, of an elongated combustion chamber independent thereof andadjacent thereto, a mouthpiece formed integrally with the top of saidcombustion chamber and projecting therefrom into the heating space ofthe boiler, means for feeding fuel into the top of said combustionchamber transversely of the path of the fiaine and gases through saidmouthpiece,

whereby said fuel Willfall on; length; of ln'iesti mony that I claim theforegoing said combustion; chamber, and means for admy mventlon Ihavesigned nay name in' mitting compressed air to .said combustionpresepceofitwosobscljbing witnesses. I chamber substaiitially' in"linewith said GARLEMILTPEDERSEN,

5 mouthpiece and. imposition torassi'st in hcon Witnesses:

suming the fuel ed t' the "combustion". M; E. ohmmm;

chamber. I y r 111e,; HERz. v

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